CN1458996A - Method for bleaching paper pulp - Google Patents
Method for bleaching paper pulp Download PDFInfo
- Publication number
- CN1458996A CN1458996A CN01815858A CN01815858A CN1458996A CN 1458996 A CN1458996 A CN 1458996A CN 01815858 A CN01815858 A CN 01815858A CN 01815858 A CN01815858 A CN 01815858A CN 1458996 A CN1458996 A CN 1458996A
- Authority
- CN
- China
- Prior art keywords
- paper pulp
- acid
- peracid
- hydrogen peroxide
- pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/101—Bleaching ; Apparatus therefor in solvent medium
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
Abstract
Various types of paper pulp are bleached in two steps at atmospheric pressure and at a temperature of less than or equal to 100 DEG C. The first step is carried out by bringing the raw pulp into contact with a mixture of peracetic acid and performic acid. The second step is carried out by treating the bleached pulp obtained from the first step, with a solution of sodium hydroxide and hydrogen peroxide. The pulps obtained have a high brightness value and a degree of polymerization close to the raw pulps. The method is ecological and nonpolluting.
Description
The present invention relates to a kind of method of bleached pulp, described paper pulp is by the wood fibre raw material, and annual plant material particularly, agricultural by product for example millet straw, sugarcane or the fragment of sugar grass slag, pine torch or lobate timber, used paper etc. make.
The purpose of this invention is to provide a kind of water content less than water-organic media of 15 weight % in the method for efficient and cost-effective ground bleaching any kind paper pulp, thereby restriction and even eliminate the sewage discharge thing and handle and just obtain brightness value greater than 70 paper pulp by two steps only.
The present invention expands to the bleached pulp of making by this method, and expands to the paper that is obtained by said paper pulp.
The conventional method that is used for bleached pulp is used oxidant, and described oxidant mainly is chlorine, oxygen and their derivative.
Carry out association with pulp bleaching by removing lignin operation, remove the lignin operation and be to the plant that forms former paper pulp heat-treat with chemical treating process in the replenishing of the operation carried out.The main points of this operation are the coloured molecules that oxidation Decomposition is formed by the residual lignin that exists in the fiber after different reorganization lignin fragment of degree (it forms deposit in to paper fiber digestion process) and the boiling substantially.
Many books and document have all been described these operations.For more detailed data, can reference, " Chemical Pulping " this this book for example, J.Gullishen, TAPPI and PaperOy publishing house, 1-145 page or leaf, 2000.(www.tappi.org)
Chlorine and derivative thereof need a large amount of water, and paper pulp per ton need be greater than 50 tons water.Sewage will be discharged into the korneforos then.
Particularly because the toxicity of the organic chlorinated compound that produces, so even before the discharging sewage is carried out chemistry and biological treatment, the pollution of chlorine and clorox also is sizable.
Oxygen, ozone and hydrogen peroxide form first solution relevant with the pollution that is caused by chlorine and derivative thereof with the use of crossing the acid type peroxide.
These technology have been known and have understood now.
Equally, for more detailed data, can be with reference to " Chemical Pulping " this this book, J.Gullishen TAPPI and Paper Oy publishing house, the 146-213 page or leaf, 2000 (www.tappi.org) have wherein described these technology widely according to very new list of references.
The water yield of using is still very big, and all these methods all need to make step that paper pulp to be bleached contacts with chemical reagent more than two steps.
And, being difficult to control ozone and hydrogen peroxide reactivity to cellulose and polysaccharide, this can cause the mechanical quality of the paper pulp of such processing to descend.
From economic and ecological viewpoint, making the number of the step that paper pulp to be bleached contacts with the water of the described amount of use and be discharged in the environment also is to make the disadvantaged factor of these technology.
The another kind of method that is different from these bleached pulps of manufacturing of conventional method is fully arranged, and this method is usually carried out by the wooden of the initial vegetable material of oxidative degradation.Usually, these technology are used by directly react performic acid and/or the peracetic acid that (being with or without catalyst) produces with hydrogen peroxide.
The research that J.Sundquist and colleague carry out this problem is published in Papper OchTr , and 88 pages,
2, on 1986, and these researchs are summarised in " Chemical Pulping ", J.Gullishen, TAPPI and Paper Oy publishing house, 421-425 (www.tappi.org), these studies show that: this class paper pulp also has second-rate mechanical quality.And when directly using peracid on plant, the consumption of hydrogen peroxide and peracid is very big, and these class methods meet with opposition economically.
The present invention plans to provide a kind of new method of bleached pulp.
Main purpose of the present invention provides a kind of new method for bleaching, this method:
-only just can obtain brightness value greater than 70 paper pulp by two steps that contact with chemical reagent, for the higher paper of quality, brightness value can reach greater than 90 and (define brightness value on the scale of 0-100; The brightness value of magnesium carbonate is 100: aspect brightness, with MgCO
3As absolute reference);
-degree of polymerization of former paper pulp keeps the mechanical property of this former paper pulp before particularly can approaching by the degree of polymerization that keeps said paper pulp to bleach, and degradation of fibers cellulose fiber not substantially;
-owing in making process of pulp, removed most of lignin, so financial cost near so that less than present commercial run;
-the utmost point is suitable for various former chemistry and semichemical wood pulp.
Another object of the present invention is that running is operated the discharge water that produces to reduce the consumption of water as much as possible thereby reduce by bleaching under the hydrating condition of alap reaction medium.
For this reason, method of the present invention is characterised in that it comprises two continuous treatment steps, and these two steps are:
-former paper pulp is contacted with the mixture of peracetic acid with performic acid, acetate and formic acid, like this, the water content of the mixture of acquisition is less than or equals 15 weight % of this mixture;
-in weakly alkaline medium (8＜pH＜10), with the paper pulp that obtains behind the hydrogenperoxide steam generator processing machine separating reaction medium.
Bleaching stage mainly takes place in a first step, this step contacts corresponding to the mixture that makes former paper pulp with performic acid and peracetic acid, performic acid and peracetic acid are actually the strong oxidizer of the residual lignin degraded that can make existence, and lignin to be former paper pulp have the different dun main causes of degree.
Experiment accident ground shows: the mixture that contains the performic acid of low amounts of water and peracetic acid can carry out especially effectively bleaching and degradation of fibers cellulose fiber not in one step.
This significant result itself should be owing to these two kinds of peracid by the active material that produces by the acid functional group that ruptured, OH particularly
+The ability that ion (its aromatic ring by close electric metalepsis lignin degrading and side chain and do not attack carbonyl and sugar substantially primary alconol and secondary alcohol functions) reacts.
Therefore, these to lignin very selectively the reaction pair cellulose chain without any tangible influence, therefore to the quality of bleached pulp also without any tangible influence, in the method for the invention, the degree of polymerization of cellulose fibre does not have or only is subjected to slight influence.
The 15 weight % that the water yield are restricted to reaction medium can obtain best result, and this is included in conventional method and uses the method for peracid to have tangible different in the blanching step (being the step that has the obvious more water yield in the reaction medium).
Under these conditions, cushion by the acetate that the exists acidity to medium, this can explain the low-down degradability of cellulose fibre.
When bleaching with excessive peracid, the solution circulated that will separate from bleached pulp to peracid is produced the reactor, and with the hydrogen peroxide treatment of 50 weight %, before peracid is transported to Bleaching reactor, to make acid concentration reach desirable value.
Like this, bleaching agent is excessive greatly with respect to coloured product to be destroyed, and this can understand significantly high efficient of this method better.
Preferably, by making acetate and formic acid and concentration contact the mixture for preparing peracetic acid and performic acid greater than the hydrogen peroxide of 50 weight %.Volume ratio is that acetic acid+peracetic acid/formic acid+performic acid of 9/1 can obtain observed best result in the experiment.
According to an embodiment preferred, the solution of performic acid and acetate can be circulated in the paper pulp stream upstream, and before recirculation, be sent to reactor that hydrogen peroxide contacts in, remain best high concentration when in circulation, contacting with paper pulp.
Another embodiment preferred will cause:
-use the 20 weight %s of the concentration of the peracid that contacts with former paper pulp as dry pulp;
-pass through paper pulp by recycle acid, this former paper pulp is contacted with the acid blends of crossing circulated in countercurrent or in fixed bed reactors;
-by deflection loop (deviation loop) enter with reactor that hydrogen peroxide contacts in and acetic acid and formic acid are reoxidised into corresponding peracid termly.
The good result of this method makes back one operation become possibility, and this solution that refers to performic acid and peracetic acid contains on a small quantity or do not contain free lignin, and this makes the solution of performic acid and peracetic acid can reuse continuously after reoxidizing with hydrogen peroxide.
Peracid solutions with treat that be preferably 1-3 hour the contact time of bleached pulp.
Preferred treatment temperature can be 60-90 ℃.
Then, by dry under vacuum the bleached pulp that obtains is carried out depickling.
In preferred embodiments, by making depickling paper pulp and pH value carry out second step for 8-10, the alkaline aqueous solution that contains 1-4 weight % hydrogen peroxide (calculating with respect to the dry pulp of handling) contact.Treatment temperature is preferably 60 ℃-100 ℃.
The purpose of this operation is to finish the bleaching operation, the last acid residue that neutralizes, and after with the demineralized water washing, provide stable, neutral, even weakly alkaline paper pulp.
The present invention expands to neutrality and the alkalescent paper pulp that obtains by this technology, and this technology is characterised in that the degree of polymerization reduces minimizing, less than the reduction of the degree of polymerization that observes in the conventional method.
With reference to the accompanying drawings 1, the mode with optimum implementation illustrates method of the present invention below.
The flowchart text of Fig. 1 is bleached the operation of former paper pulp.Certain operations itself is known.
The novelty of the inventive method mainly is: contain organic acid and degree of hydration will by circulation The organic water phase of the residue peracid that is controlled is produced peracid.
As final result, this can make and only consume hydrogen peroxide in the operation, from selective and effect See on the rate angle that (it is first than the known bleaching phase of direct use hydrogen peroxide own for this Stage can not reach the significant performance of the inventive method) more advantageous.
Therefore, thus the drying residual moisture content is about 20% paper pulp and just is exposed to and contains weight in advance Degree of hydration is in the water-organic solution of peracid of 5-8 % by weight.
After reacting about 1-3 hour, by the extruding brightness value greater than 65 paper pulp come Separation of Water-Organic solution.
In being heated to 60 ℃-85 ℃ vacuum chamber (20-30KPa), paper pulp is carried out depickling.
The organic acid that reclaims is joined in the liquid phase that is obtained by extruding.
Should be noted that: in the process that this operation continues, remaining hydrogen peroxide still is retained in In the paper pulp.
By utilizing for example cyclohexane (water/cyclohexane azeotropic mixture: boiling point: under the atmospheric pressure 69.8 of solvent ℃, water content 8.5 % by weight) carry out azeotropic distillation and come from extruding with under vacuum the depickling operation The solution that obtains organic acid and peracid dewaters.
The purpose of this distillation is being transported to organic acid for bleaching at acid medium Before in the reactor, processing this organic acid with 50 % by weight hydrogenperoxide steam generators to increase for this reason Purpose and before the mistake acid content in the reactor that arranges, make the organic acid water concentration remain 4 % by weight.
The paper pulp of depickling is incorporated in second reactor, and is exposed to and is in weak alkaline medium (pH Value is 8-10) in hydrogenperoxide steam generator in (be 100% with respect to dry pulp, hydrogen peroxide is 2 % by weight). The duration of processing is 1-3 hour, and temperature is 60-100 ℃.
This operation can be finished bleaching by increasing some brightness values, and particularly can use This paper pulp neutralizes before the demineralized water washing.
At any time can use the neutral paper pulp that separates by extruding.
Owing to there is a strong oxidizer in bleaching stage, for example peracid and hydrogen peroxide are so take off The washing lotion that reclaims in the water process and the content of organics of water are low.
They all can be recycled in the pulp production that needs certain water gaging, and no matter institute makes With method of manufcturing paper pulp.
Therefore, different from present method for bleaching under the prerequisite of high-efficiency and economic, be in it The inventive method of good operation does not produce the emission of pollution.
The following example that carries out in the laboratory has illustrated method of the present invention.
Embodiment 1
The paper pulp that bleaching is made with straw
Under the condition of in disclosed French Patent (FRP) No.9713658 on October 30th, 1997 (publication number No.2770543), describing, in the organic acid medium, the air dried straw of 50 grams is carried out delignification and handle.
After finishing boiling, the paper pulp that manual compression obtains (25 gram dries, the kappa value is 30, the degree of polymerization is 1450), and make itself and 500cm
3Acetic acid+peracetic acid/formic acid+performic acid volume ratio is that 9/1 the acetate and the solution of formic acid, peracetic acid and performic acid contact.
By making acetate and formic acid and concentration minimum is that the hydrogen peroxide of 50 weight % contacts and prepares peracid (60 ℃ of temperature, 3 hours duration).
The concentration of hydrogen peroxide is about 0.35 mole in every liter of organic acid mixture.
The water content of this former paper pulp is less than 10 weight %.
Keep down suspending 3 hours at 60 ℃.
When 3 hours past tenses, filter this paper pulp, manual compression is also used distilled water wash.
Analyze peracid and remaining hydrogen peroxide.
The concentration of peracid is 0.2 mol in the restored acid, and the concentration of peracid is 0.3 mol in the starting acid.
The concentration of hydrogen peroxide is 0.08 mol, and in initial organic acid and mistake acid blend, the concentration of hydrogen peroxide is 0.15 mol.
Enrich restored acid in new bleaching operation, to use with hydrogen peroxide.
Behind distilled water wash, the paper pulp that pushed is contacted with the alkaline solution of hydrogen peroxide, this alkaline solution contains with respect to dry pulp (pH is about 10) and is 4 weight % NaOH and is 2 weight % hydrogen peroxide with respect to dry pulp.
Liquid-solid ratio is 6/1 weight.
90 ℃ of down contacts after 2 hours, filter, extruding and with distilled water wash, this paper pulp of air drying.
The kappa value is less than 1.
The degree of polymerization is 1350.
Brightness value is 88.
Embodiment 2
Press embodiment 1 and handle 50 gram straws.
With the same among the embodiment 1, (the kappa value is 30, the degree of polymerization: 1450) bleach to former straw pulp in acid medium.
After filtering this paper pulp, manual compression, outgases to this paper pulp under vacuum in rotary evaporator to reclaim maximum acid, peracid and remaining hydrogen peroxide.
Pressure mean values remains 25Kpa.
From beginning to end of evaporation stage, temperature becomes 80 ℃ from 60 ℃.
This might reclaim organic acid and cross the different condensate of acid concentration.
Hydrogen peroxide mainly is present in the paper pulp that evaporates after the acid.
Behind this evaporation stage, making this paper pulp and liquid-solid ratio is that 7/1 sodium hydroxide solution (pH10) contacts.
Treatment temperature is 95 ℃.
Handling the duration is 2 hours.
The kappa value that obtains is less than 1.
Brightness value is 88.
The degree of polymerization of the bleached pulp that obtains is 1350.
Embodiment 3
The primary industry kraft pulp that bleaching is made with pine torch.
With air dried, the 25 gram primary industry kraft pulps made from pine torch (the kappa value is 35, and the degree of polymerization is 1500) mix by the mixture of acetate, formic acid, peracetic acid and the performic acid of embodiment 1 preparation with 100cc.
By making acetate and formic acid and concentration minimum is that the hydrogen peroxide of 50 weight % contacts and prepares peracid (60 ℃ of temperature, 3 hours duration).
The concentration of hydrogen peroxide is 0.35 mole in every liter of organic acid mixture.
The water content of this raw material paper pulp is less than 10 weight %.
Keep down suspending 2 hours 30 minutes at 70 ℃.
Filter this paper pulp then, manual compression is also used distilled water wash.
Analyze peracid and hydrogen peroxide.
The concentration of peracid is 0.18 mol in the restored acid, and the concentration of peracid is 0.3 mol in the starting acid.
The concentration of hydrogen peroxide is 0.07 mol, and in initial organic acid and mistake acid blend, the concentration of hydrogen peroxide is 0.15 mol.
Enrich restored acid in new bleaching operation, to use with hydrogen peroxide.
Behind distilled water wash, the paper pulp that pushed is contacted with the hydrogen peroxide alkaline solution, this alkaline solution contains with respect to this dry pulp (the pH value is about 10) and is 4 weight % NaOH and is 2 weight % hydrogen peroxide with respect to this dry pulp.
Liquid-solid ratio is 6/1 weight.
85 ℃ of down contacts after 2 hours, filter, extruding and with distilled water wash, this paper pulp of air drying.
The kappa value is less than 1.
The degree of polymerization of the bleached pulp that obtains is 1350.
Brightness value is 87.
Embodiment 4
The industrial ammonium bisulfite paper pulp that bleaching is made with pine torch.
It is air dried to press embodiment 3 processing, with the industrial ammonium bisulfite paper pulp of 25 grams of pine torch (the kappa value is 30, and the degree of polymerization is 1550) manufacturing.
The brightness value of the bleached pulp that obtains is 90.The kappa value is less than 1.
The degree of polymerization is 1300.
Claims (16)
1. method of bleaching former paper pulp with organic peracid is characterized in that at atmospheric pressure, is less than or equal under 100 ℃ the temperature and divides two steps to carry out this method:
-by being contacted with the mixture of peracetic acid and performic acid, former paper pulp carries out the first step, and like this, the water content of the mixture of acquisition is for being less than or equal to 15 weight %;
Behind the reaction medium that-mechanical separation obtains when the first step finishes, the bleached pulp that obtains by the solution-treated with NaOH and hydrogen peroxide carried out for second step.
2. the method for claim 1 is characterized in that mixture and concentration by making acetate and formic acid contacts greater than the hydrogen peroxide of 50 weight % to obtain peracetic acid and performic acid.
3. claim 1 and 2 method is characterized in that the volume ratio of acetic acid+peracetic acid/formic acid+performic acid is about 9/1.
4. claim 1,2 and 3 method, the amount that it is characterized in that peracid when the first step begins is more than or equal to 20 weight %.
5. claim 1,2,3 and 4 method is characterized in that making former paper pulp and crossing the acid blend counter current contacting by the circulation peracid.
6. claim 1,2,3,4 and 5 method is characterized in that enriching peracid solutions behind first blanching step so that the concentration of peracid reaches selected value with peracid.
7. claim 1,2,3,4,5 and 6 method is characterized in that by extruding the paper pulp of handling in the first step being separated with peracid.
8. claim 1,2,3,4,5,6 and 7 method is characterized in that by carrying out dry the paper pulp that pushed being carried out depickling under vacuum, and the hydrogen peroxide of remnants are stayed in the paper pulp.
9. claim 1,2,3,4,5,6,7 and 8 method, be 1-3 hour contact time that it is characterized in that peracid and former paper pulp.
10. claim 1,2,3,4,5,6,7,8 and 9 method is characterized in that treatment temperature is 60-90 ℃.
11. claim 1,2,3,4,5,6,7,8,9 and 10 method is characterized in that contacting and carrying out second step by paper pulp that makes depickling and the alkaline aqueous solution (pH value is 8-10) that contains 1-4 weight % hydrogen peroxide (calculating with respect to dry pulp).
12. claim 1,2,3,4,5,6,7,8,9,10 and 11 method is characterized in that be 1-3 hour the contact time of paper pulp and hydrogen peroxide in alkaline medium.
13. claim 1,2,3,4,5,6,7,8,9,10,11 and 12 method, it is characterized in that extruding after, the paper pulp that in second step, obtains with the demineralized water washing.
14. claim 1,2,3,4,5,6,7,8,10,10,11,12 and 13 method is characterized in that extracting the water of introducing by former paper pulp on the one hand by distillation from circulation, extract hydrogen peroxide on the other hand.
15. according to the paper pulp that claim 1,2,3,4,5,6,7,8,9,10,11,12,13 and 14 method obtain, its brightness value is greater than 70.
16. the paper that uses the paper pulp of claim 15 to make.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR00/11831 | 2000-09-18 | ||
| FR0011831A FR2814180B1 (en) | 2000-09-18 | 2000-09-18 | PROCESS FOR BLEACHING PAPER PULP IN AN ORGANIC MEDIUM WITH CONTROLLED HYDRATION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1458996A true CN1458996A (en) | 2003-11-26 |
| CN1231634C CN1231634C (en) | 2005-12-14 |
Family
ID=8854374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018158587A Expired - Lifetime CN1231634C (en) | 2000-09-18 | 2001-09-14 | Method for bleaching paper pulp |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US6866749B2 (en) |
| EP (1) | EP1322814B8 (en) |
| CN (1) | CN1231634C (en) |
| AT (1) | ATE501305T1 (en) |
| AU (2) | AU9002801A (en) |
| BR (1) | BR0113955A (en) |
| CA (1) | CA2422610C (en) |
| DE (1) | DE60144190D1 (en) |
| DK (1) | DK1322814T3 (en) |
| EA (1) | EA005240B1 (en) |
| ES (1) | ES2360503T3 (en) |
| FR (1) | FR2814180B1 (en) |
| PT (1) | PT1322814E (en) |
| WO (1) | WO2002022945A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171387B (en) * | 2005-05-03 | 2012-02-08 | 植物材料工业公司 | Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation |
| CN103014185A (en) * | 2011-09-23 | 2013-04-03 | 坎普利斯公司 | Pretreatment method for producing water-soluble sugars from lignocellulosic material |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI118735B (en) * | 2005-09-13 | 2008-02-29 | Kemira Oyj | Process for the preparation of peroxy acids |
| FI119800B (en) * | 2006-11-09 | 2009-03-31 | Kemira Oyj | Procedures for preventing the growth of microorganisms and combinations that prevent the growth of microorganisms |
| WO2009118714A2 (en) | 2008-03-28 | 2009-10-01 | Ecolab Inc. | Sulfoperoxycarboxylic acids, their preparation and methods of use as bleaching and antimicrobial agents |
| US8809392B2 (en) | 2008-03-28 | 2014-08-19 | Ecolab Usa Inc. | Sulfoperoxycarboxylic acids, their preparation and methods of use as bleaching and antimicrobial agents |
| US8871807B2 (en) | 2008-03-28 | 2014-10-28 | Ecolab Usa Inc. | Detergents capable of cleaning, bleaching, sanitizing and/or disinfecting textiles including sulfoperoxycarboxylic acids |
| WO2012037294A2 (en) | 2010-09-14 | 2012-03-22 | Pimi Agro Cleantech Ltd. (Israel) | Compositions and methods of treating edible matter and substrates therefor |
| US8845860B2 (en) | 2010-09-16 | 2014-09-30 | Georgia-Pacific Consumer Products Lp | High brightness pulps from lignin rich waste papers |
| US9321664B2 (en) | 2011-12-20 | 2016-04-26 | Ecolab Usa Inc. | Stable percarboxylic acid compositions and uses thereof |
| CN104254496B (en) | 2012-03-30 | 2016-10-26 | 艺康美国股份有限公司 | Peracetic acid/hydrogen peroxide and peroxide reducing agent are for processing drilling fluid, fracturing fluid, recirculation water and the purposes of discharge water |
| US8822719B1 (en) | 2013-03-05 | 2014-09-02 | Ecolab Usa Inc. | Peroxycarboxylic acid compositions suitable for inline optical or conductivity monitoring |
| US20140256811A1 (en) | 2013-03-05 | 2014-09-11 | Ecolab Usa Inc. | Efficient stabilizer in controlling self accelerated decomposition temperature of peroxycarboxylic acid compositions with mineral acids |
| US10165774B2 (en) | 2013-03-05 | 2019-01-01 | Ecolab Usa Inc. | Defoamer useful in a peracid composition with anionic surfactants |
| FR3016359B1 (en) | 2014-01-10 | 2022-04-29 | Arkema France | HYDROGEN PEROXIDE COMPOSITIONS FOR THE DELIGNIFICATION OF PLANT MATERIAL AND THEIR USES |
| WO2016100694A1 (en) | 2014-12-18 | 2016-06-23 | Ecolab Usa Inc. | Generation of peroxyformic acid through polyhydric alcohol formate |
| US11040902B2 (en) | 2014-12-18 | 2021-06-22 | Ecolab Usa Inc. | Use of percarboxylic acids for scale prevention in treatment systems |
| US9845290B2 (en) | 2014-12-18 | 2017-12-19 | Ecolab Usa Inc. | Methods for forming peroxyformic acid and uses thereof |
| CN107604731A (en) * | 2017-11-02 | 2018-01-19 | 山东东平容业达植物纤维科技有限公司 | A kind of bleaching process in stalk fibre extraction process |
| AU2019285304B2 (en) | 2018-06-15 | 2021-10-14 | Ecolab Usa Inc. | On site generated performic acid compositions for teat treatment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3005947B1 (en) * | 1980-02-16 | 1981-01-29 | Degussa | Process for bleaching pulp using organic peracid |
| ES2086183T3 (en) * | 1992-07-06 | 1996-06-16 | Solvay Interox | PROCEDURE FOR THE DELIGNIFICATION OF A CHEMICAL PAPER PASTE. |
| US6007678A (en) * | 1992-11-27 | 1999-12-28 | Eka Nobel Ab | Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof |
| BR9609160A (en) * | 1995-06-29 | 1999-12-14 | Reijo K Salminen | Continuous digester system, wood chip digestion process |
| FI103899B1 (en) * | 1996-11-06 | 1999-10-15 | Chempolis Oy | A process for preparing a particularly light pulp |
-
2000
- 2000-09-18 FR FR0011831A patent/FR2814180B1/en not_active Expired - Fee Related
-
2001
- 2001-09-14 CN CNB018158587A patent/CN1231634C/en not_active Expired - Lifetime
- 2001-09-14 BR BR0113955-0A patent/BR0113955A/en not_active IP Right Cessation
- 2001-09-14 AU AU9002801A patent/AU9002801A/en active Pending
- 2001-09-14 ES ES01969897T patent/ES2360503T3/en not_active Expired - Lifetime
- 2001-09-14 US US10/380,066 patent/US6866749B2/en not_active Expired - Lifetime
- 2001-09-14 WO PCT/FR2001/002867 patent/WO2002022945A1/en active IP Right Grant
- 2001-09-14 DK DK01969897.6T patent/DK1322814T3/en active
- 2001-09-14 EP EP01969897A patent/EP1322814B8/en not_active Expired - Lifetime
- 2001-09-14 AT AT01969897T patent/ATE501305T1/en active
- 2001-09-14 EA EA200300383A patent/EA005240B1/en not_active IP Right Cessation
- 2001-09-14 PT PT01969897T patent/PT1322814E/en unknown
- 2001-09-14 DE DE60144190T patent/DE60144190D1/en not_active Expired - Lifetime
- 2001-09-14 AU AU2001290028A patent/AU2001290028B2/en not_active Expired
- 2001-09-14 CA CA002422610A patent/CA2422610C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171387B (en) * | 2005-05-03 | 2012-02-08 | 植物材料工业公司 | Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation |
| CN103014185A (en) * | 2011-09-23 | 2013-04-03 | 坎普利斯公司 | Pretreatment method for producing water-soluble sugars from lignocellulosic material |
| CN103014185B (en) * | 2011-09-23 | 2016-08-03 | 坎普利斯公司 | The preprocess method of water-soluble sugar is produced by ligno-cellulosic materials |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2814180A1 (en) | 2002-03-22 |
| PT1322814E (en) | 2011-05-02 |
| DE60144190D1 (en) | 2011-04-21 |
| AU2001290028B2 (en) | 2005-12-01 |
| US6866749B2 (en) | 2005-03-15 |
| FR2814180B1 (en) | 2003-12-05 |
| CA2422610C (en) | 2009-12-01 |
| BR0113955A (en) | 2003-07-22 |
| CN1231634C (en) | 2005-12-14 |
| US20040035537A1 (en) | 2004-02-26 |
| ATE501305T1 (en) | 2011-03-15 |
| EP1322814A1 (en) | 2003-07-02 |
| DK1322814T3 (en) | 2011-06-14 |
| EA200300383A1 (en) | 2003-08-28 |
| EP1322814B8 (en) | 2011-05-25 |
| WO2002022945A1 (en) | 2002-03-21 |
| AU9002801A (en) | 2002-03-26 |
| EP1322814B1 (en) | 2011-03-09 |
| CA2422610A1 (en) | 2002-03-21 |
| EA005240B1 (en) | 2004-12-30 |
| ES2360503T3 (en) | 2011-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1231634C (en) | Method for bleaching paper pulp | |
| RU2139965C1 (en) | Method of preparing pulp from cellulose-containing material | |
| US20040244925A1 (en) | Method for producing pulp and lignin | |
| RU2534067C2 (en) | Method of obtaining cellulose from lignocellulose-containing biomass | |
| CN100513680C (en) | Paper pulp making technology by biological catalytic cracking method | |
| CN1854388A (en) | The production method and pulp maked bamboos | |
| CN1352716A (en) | Method for separating lignocellulose-containing biomass | |
| US5074960A (en) | Lignin removal method using ozone and acetic acid | |
| EP0937172A1 (en) | Method of producing pulp using single-stage cooking with formic acid and washing with performic acid | |
| US4897156A (en) | Process for activating cellulose pulp with NO and/or NO2 and oxygen in the presence of nitric acid and then delignifying bleaching the activated cellulose pulp | |
| CN1297085A (en) | Method for use of activated ozone in bleaching paper pulp | |
| CN1349577A (en) | Process for production of paper materials with improved wet strength | |
| US5529660A (en) | Method of reducing fluorescence in deinked pulp by treating pulp with ozone and a bleaching agent | |
| WO2012070072A2 (en) | A process for obtaining alpha-cellulose | |
| CN1600989A (en) | Method for fabrication food wrap paper and cultural paper by using corn stalk to make no chlorin bleached pulp | |
| JP2006274478A (en) | Papermaking chemical pulp having improved discoloration property | |
| AU8809698A (en) | Method for the recovery of formic acid | |
| FR3048247B1 (en) | PROCESS FOR PREPARING A MIXTURE OF MONOSACCHARIDES AND / OR OLIGOSACCHARIDES AND / OR POLYSACCHARIDES BY PURIFYING A HYDROLYSAT OF LIGNOCELLULOSIC MATERIALS | |
| CN1065109A (en) | High efficiency chlorine dioxide pulp bleaching process | |
| KR20170130268A (en) | Co-production method of microcrystalline cellulose and polyol in terms of cellulose hydrolysis and lignocellulose liquefaction, and co-produced microcrystalline cellulose and polyol | |
| Ma et al. | Pulp and fiber characterization of bamboo dissolving pulp | |
| CN1209480A (en) | Method for using ozone in bleaching of ECF | |
| WO2022235212A1 (en) | Process for treating non-wood feedstock | |
| JP2011225658A (en) | Method for pretreatment of biomass | |
| JP2007162148A (en) | Method for bleaching papermaking raw material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20051214 |
|
| CX01 | Expiry of patent term |